Method and system for supplying thermal energy to a thermal processing system from the gasification of dry, carbon-containing raw materials, followed by oxidation, and installation for operating this system

Abstract

The invention comprises a thermal power supply process for a treatment system for raw material. It also refers to a system operating this process and a facility operating said system. The process comprises steps of gasification of dry raw material containing carbon (MPCS) in a first reactor by a gaseous flow of gasification containing CO 2 , oxidation of gasification gases by oxygen holders in a second reactor and an activation of the oxygen holders as used during the oxidation in a third reactor.

What is claimed is: 
     
       1. A process to supply power to a thermal treatment system of raw material, the process comprising:
 gasifying dry material containing carbon in a gasification reactor for dry raw material containing carbon (MPCS) with a gaseous flow of gasification (FGG) containing CO 2  at a temperature higher than 900° C. and oxygen (O 2 ), the gasifying supplying a first gaseous flow (PFG) comprising molecules of carbon monoxide, di-hydrogen and water steam; 
 oxidizing the first gaseous flow in an oxidation reactor by oxygen holders in an oxidized state (MeO, where Me is a metal) of the molecules of carbon monoxide and di-hydrogen as present in said first gaseous flow (PFG), to supply a second gaseous flow (DFG) at a temperature higher than 900° C. and comprising CO 2 , water steam and oxygen holders in a reduced state (Me), wherein the temperature of the second gaseous flow imparts thermal power to the second gaseous flow; 
 activating the oxygen holders in a reduced state within an activation reactor with a gaseous flow (FAP) comprising elements of oxygen, the activating supplying oxygen holders in oxidized state (MeO) and an excess of thermal power; 
 supplying one or more of at least a part of the thermal power of said second gaseous flow (DFG) or the excess thermal power from the activating to the thermal treatment system for raw material; and 
 increasing of temperature of the gaseous flow of gasification (FGG) with at least a part of the excess thermal power from the activating of oxygen holders to increase the temperature of the gaseous flow of gasification (FGG) to the gasification temperature. 
 
     
     
       2. The process of  claim 1 , comprising the supplying of at least a part of the thermal power to the thermal treatment system for raw material by supplying of at least a part of the second gaseous flow (DFG) to the thermal treatment system for raw material for use as a gaseous thermal treatment flow (FGT). 
     
     
       3. The process of  claim 2 , further comprising a reduction in the temperature of the at least a part of the second gaseous flow (DFG) before the use as the gaseous flow of treatment (FGT). 
     
     
       4. The process of  claim 2 , wherein the process is conducted in a thermal process supply system comprising the gasification reactor, the oxidation reactor, and the activation reactor, the process further comprising closed circuit recycling from the thermal treatment system for raw material to the thermal process supply system of at least one part of the CO 2  present in the gaseous flow of treatment as a gaseous flow of loaded thermal treatment (FGTC) at an outlet of the thermal treatment system, said recycling in closed circuit comprises a step of separating CO 2  from water steam in the loaded gaseous flow of treatment (FGTC), wherein the separated CO 2  is recycled to constitute at least in part the gaseous flow of gasification. 
     
     
       5. The process of  claim 1 , wherein the supplying comprises transference of the one or more of the thermal power or the excess thermal power to a gaseous flow of thermal treatment. 
     
     
       6. The process of  claim 5 , further comprising closed circuit recycling of at least a part of CO 2  from the second gaseous flow (DFG) to constitute said gaseous flow of gasification. 
     
     
       7. The process of  claim 1 , wherein the activating comprises an oxidation of said oxygen holders in reduced state (Me) by pre-heated atmospheric air (FAP). 
     
     
       8. The process of  claim 4 , wherein the activating comprises an oxidation of said oxygen holders in reduced state (Me) by pre-heated atmospheric air (FAP). 
     
     
       9. The process of  claim 8 , wherein the pre-treated atmospheric air is pre-heated in a step comprising transference of thermal power after the gaseous flow of loaded thermal treatment (FGTC) at the outlet of the thermal treatment system to said atmospheric air.